Home / 18,813.83-28,221.12-5,487.80

Finding the Fourth Proportional to 18,813.83, 28,221.12 and 5,487.80

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Solution

The fourth proportional to 18,813.83, 28,221.12 and 5,487.80 is: 8,231.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,813.83 : 28,221.12 = 5,487.80 : x
  2. Step 2: Convert to fraction form
    18,813.83/28,221.12 = 5,487.80/x
  3. Step 3: Cross multiply
    18,813.83x = 28,221.12 × 5,487.80
  4. Step 4: Simplify right side
    18,813.83x = 154,871,721.23
  5. Step 5: Solve for x
    x = 154,871,721.23/18,813.83
  6. Step 6: Final answer
    x = 8,231.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.